You all know those little tombstones left by killed troops. Maybe they should be marked with certain icons so we know what troop died. For example, an archer would have an arrow on her grave, a barbarian would have a sword, a hog rider would have a hammer, a valkyrie would have a dual axe, etc.
Now in order to promote more game play, witches should be allowed to raise "THE DEAD." The witch should have like a four tile radius, and if a few graves are in that radius, she would raise them. To prevent raising a too powerful of a troop, each troop would have different health and attack stats than when they were alive. These troops would also be skeletons. For example, if a dragon was raised, you wouldn't see a dragon, you'd see the skeleton of a dragon.
Tier 1 & 2 Troops: 1/2 of actual stats.
Tier 3 Troops: 1/4 of actual stats.
I think dark troops should be divided in tiers as well.
DE Tier 1 Troops: 1/4 of actual stats. (Minions, Hog Riders, Valkyries)
DE Tier 2 & 3 Troops: 1/8 of actual stats. (Golems, Witches, Lava Hounds, Level 7 DE Troop) (Level 8,9,10 DE Troop)

